PhD Candidate in Quantum Optics and Gravity at University of Vienna (Aspelmeyer Group) University of Vienna in Austria

The University of Vienna invites applications for a PhD Candidate (University Assistant, predoctoral) in the Faculty of Physics, joining the renowned Aspelmeyer group. This four-year position focuses on cutting-edge research at the interface of quantum optics and gravity, exploring questions such as how quantum objects gravitate and how massive objects can be pushed into the quantum regime. The research aims to provide new insights into macroscopic quantum physics, gravity at small scales, and the phenomenology of the gravity-quantum interface through innovative table-top experiments.

As part of the Aspelmeyer group, you will investigate the fundamentals and applications of macroscopic quantum coherence in levitated solid-state platforms. The group is embedded within the Quantum Optics, Quantum Nanophysics, and Quantum Information group at the Faculty of Physics, and is a member of the Vienna Center for Quantum Science and Technology (VCQ) and the Austrian Cluster of Excellence (quantA). These affiliations offer access to a vibrant community of over 100 quantum scientists on site and approximately 300 quantum researchers in Vienna, fostering collaboration and innovation.

The main research activities include quantum optical control of levitated solid-state objects, exploration of their quantum properties for fundamental questions and novel quantum technology platforms, and precision measurements of ultra-weak gravitational forces. The group explores extreme regimes of motional quantum states of solids and their interactions, aiming to maximize mass, delocalization, and coherence time in quantum experiments. On the gravity side, the focus is on isolating gravitational phenomena of miniature source masses from other interactions at microscopic scales.

Responsibilities include active participation in research, teaching, and administration. You will be involved in a well-funded research project, present your research plan to the faculty, and complete a dissertation agreement within 12-18 months, reviewed annually. The position requires independence, teamwork, and social awareness. Teaching duties include lab courses and exercise classes, and you will contribute to group administration and outreach through publications, conference presentations, and public activities.

Applicants must hold a Master's degree or Diploma in physics, with a thesis in experimental quantum optics, quantum optomechanics, or quantum control. Experience in academic writing, a solid background in experimental quantum optics, opto-mechanics, and optical or diamagnetic levitation, as well as familiarity with advanced experimental tools (homodyne and heterodyne detection, programming), are required. Excellent written and spoken English is essential.

The University of Vienna offers an inspiring international academic environment, excellent public transport connections, opportunities for professional development, and access to over 600 internal training courses free of charge. The position provides a fair salary of EUR 3,776.10 (full-time basis, 14x per year), with increases for credited professional experience. Employment is for four years, initially limited to 1.5 years, with automatic extension unless terminated within the first 12 months. The university is committed to equal opportunities, diversity, and the advancement of women, with preference given to female candidates of equal qualification.

To apply, submit your scientific CV, summary of academic and research achievements, statement of research interests, Bachelor's and Master's degree certificates, and abstract of your Master's thesis. The application deadline is May 14, 2026. For content questions, contact Professor Markus Aspelmeyer at [email protected]. Apply via the provided link.